KR101578213B1 - Liquid crystal display device - Google Patents

Abstract

The present invention discloses a liquid crystal display device capable of realizing a differentiated appearance design from the conventional one.

A liquid crystal display device of the present invention includes a liquid crystal display panel, a backlight unit disposed below the liquid crystal display panel, a screen protector disposed on the liquid crystal display panel to protect the liquid crystal display panel from the outside, And a color layer formed on the liquid crystal display panel and reflecting light of a specific wavelength band. The color filter substrate of the liquid crystal display panel includes red, green, and blue color filters for displaying colors in each pixel, And an offset color filter for canceling light reflected by the color layer.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of realizing a differentiated appearance design from a conventional one.

2. Description of the Related Art [0002] Liquid crystal displays (LCDs) are becoming more and more widespread due to features such as light weight, thinness, and low power consumption driving. According to this trend, liquid crystal display devices are used in office automation equipment, audio / video equipment, and the like. The liquid crystal display device displays a desired image on the screen by controlling the amount of transmitted light according to a video signal applied to a plurality of control switches arranged in a matrix form.

Since the liquid crystal display device is not a self-luminous display device, a backlight unit for providing light to the back of a liquid crystal display panel on which an image is displayed is provided.

1 is a view showing a general liquid crystal display device.

1, a typical liquid crystal display device includes a color filter substrate 60 and an array substrate 10 which are spaced apart from each other by a predetermined distance and which are opposed to each other and a color filter substrate 60 which is disposed between the color filter substrate 60 and the array substrate 10 And a liquid crystal layer 80 interposed therebetween.

A plurality of gate lines 8 and a plurality of data lines 20 intersect each other on the array substrate 10 and a pixel region P defined by intersecting the gate lines 8 and the data lines 20, The pixel electrode 30 connected to the pixel electrode Tr is formed.

A color filter layer 70 having red, green, and blue color filter patterns corresponding to the pixel regions P and a common electrode 75 are sequentially formed below the color filter substrate 60. Although not shown in the figure, a black matrix (not shown) is formed at the boundary of each color pattern of the color filter layer 70 to block light on a region where the arrangement of the liquid crystal is not controlled.

A general liquid crystal display device having such a configuration maintains a black state on the display screen in a state in which there is no power consumption. That is, in a general liquid crystal display device, the backlight unit can not express a separate color in the off state, but maintains only the black state.

It is an object of the present invention to provide a liquid crystal display device capable of exhibiting appearance design different from the conventional one.

According to an embodiment of the present invention,

A liquid crystal display panel; A backlight unit disposed below the liquid crystal display panel; A screen protector disposed on the liquid crystal display panel for protecting the liquid crystal display panel from the outside; And a color layer formed on the liquid crystal display panel and reflecting light of a specific wavelength band, wherein the color filter substrate of the liquid crystal display panel has red, green, and blue color And a canceling color filter for canceling light reflected by the color layer.

The present invention is advantageous in that a color layer for reflecting light of a specific wavelength band is formed on the screen protector and displays colors using external light even when the driving of the liquid crystal display device is stopped, .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail.

3 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the liquid crystal display module taken along line I-I ' Sectional view of the display device.

2 to 4, the liquid crystal display module 100 includes a liquid crystal display panel 110 on which an image is displayed, a panel guide 115 for supporting a lower edge of the liquid crystal display panel 110, A backlight unit 120 coupled to the panel guide 115 to provide light to the liquid crystal display panel 110 and a backlight unit 120 surrounding the edge of the liquid crystal display panel 110 and coupled to the panel guide 115. [ And a case 101.

Although not shown in detail, the liquid crystal display panel 110 includes a thin film transistor (TFT) substrate and a color filter substrate bonded together to maintain a uniform cell gap, and a liquid crystal layer . In the thin film transistor substrate, a plurality of gate lines are formed, a plurality of data lines intersecting the plurality of gate lines are formed, and a thin film transistor (TFT) is formed in a crossing region between the gate lines and the data lines.

A gate driving PCB (111) for supplying a scan signal to the gate line, a data driving PCB (112) for supplying a data signal to the data line, .

The gate and data driving PCBs 111 and 112 are electrically connected to the liquid crystal display panel 110 by a chip on film (COF). Here, the COF may be changed to a TCP (Tape Carrier Package).

The backlight unit 120 will be described as an example of a direct-down type provided in a large-sized liquid crystal display device of 20 inches or more.

The backlight unit 120 includes a box-shaped bottom cover 180 having an opened upper surface, a plurality of light sources 150 disposed at a predetermined interval on the bottom cover 180, and a plurality of light sources 150 An optical sheet 130 disposed on the diffusion plate 131 for condensing and secondarily diffusing light, and a plurality of light sources (light sources) And a reflective sheet 170 disposed at a lower portion of the light source 150 to reflect light traveling downward of the light sources 150 toward the liquid crystal display panel 110.

The backlight unit 120 includes first and second light source drivers 160a and 160b disposed at both ends of the plurality of light sources 150 to supply driving signals.

The first and second light source driving units 160a and 160b may include first and second driving PCBs 162a and 162b and light sources 150 mounted on the first and second driving PCBs 162a and 162b. And first and second sockets 164a and 164b that are in contact with both ends of the first and second sockets 164a and 164b.

The backlight unit 120 is disposed on both ends of the plurality of light sources 150 and guides the light emitted from the light sources 150 to the edge area of the liquid crystal display panel 110, And first and second support sides 140a and 140b for supporting the first and second support members 130 and 130. [

However, the present invention is not limited thereto. For example, a cold cathode fluorescent lamp (CCFL), a light emitting diode (LED) A diode (LED) or the like may be provided.

The liquid crystal display device according to an embodiment of the present invention includes a screen protector 200 disposed on the liquid crystal display module 100 to protect the liquid crystal display panel 110 from the outside.

The screen protector 200 is made of reinforced acrylic or tempered glass and has a function of protecting the liquid crystal display module 100 from external impact as well as protecting the liquid crystal display module 100 from moisture.

A color layer 201 is formed on the lower surface of the screen protector 200 to reflect light of a specific wavelength band and express color using external light.

The color layer 201 may be formed on the screen protector 200 using a printing process.

The specific wavelength band may be determined at the time of designing, and may be a color layer 201 capable of reflecting, for example, wavelength band lights of red, green, and blue.

That is, in the liquid crystal display device according to an embodiment of the present invention, the color can be displayed by the color layer 201 formed on the screen protector 200 while the backlight unit 120 of the liquid crystal display device is off.

As described above, in the liquid crystal display device according to the embodiment of the present invention, the structure in which the color layer 201 is formed on the lower surface of the screen protector 200 is limited. However, (201) may be formed on the upper surface of the screen protector (200) or on the surface of the liquid crystal display panel (110).

5 is a plan view showing a part of the color filter substrate of the present invention.

As shown in FIG. 5, the color filter substrate of the present invention includes a red sub-pixel (Red) 301 in which a red color filter is formed in one pixel 300, and a cyan sub pixel (Cyan) 302 in which a cyan color filter is formed. A green sub-pixel (Green) 303 having a green color filter, and a red violet sub-pixel (Magenta) 304 having a red violet color filter. A blue sub-pixel (Blue) 305 in which a blue color filter is formed, and a yellow sub-pixel (Yellow) 306 in which a yellow color filter is formed.

That is, one pixel 300 includes a red sub pixel 301, a cyan sub pixel 302, a green sub pixel 303, a red purple sub pixel 304, a blue sub pixel 305 and a yellow sub pixel 306 Are sequentially formed in the first direction.

Here, the cyan sub-pixel 302 may have a structure in which a green color filter and a blue color filter are sequentially overlapped with each other, and the red purple sub-pixel 304 sequentially overlaps the blue color filter and the red color filter And the yellow sub-pixel 306 may be formed by sequentially overlapping a red color filter and a green color filter.

The red. The green and blue sub-pixels 301, 303, and 305 have a function of implementing a color for displaying an image of the liquid crystal display panel.

The cyan, magenta, and yellow sub-pixels 302, 304, and 306 have a function of canceling light reflected on a color layer formed on a screen protector. Thus, the cyan, red violet, and yellow sub-pixels 302, 304, and 306 may be defined as offset color filters.

For example, when the color layer reflects red light, the red, green, and blue sub-pixels 301, 303, and 305 are driven to display an image, and the cyan sub- The red light of the layer is canceled to prevent the degradation of the display quality due to the color layer in the image display.

When the color layer reflects green light and displays a blue image, the blue sub-pixel 305 of the pixel 300 is driven to display an image, and the red violet sub-pixel 304 is driven to emit green light Lt; / RTI >

When the color layer reflects blue light and displays a blue image, it is possible to turn off all pixels 300 and display an image using external light. Here, when the blue sub-pixel 305 is driven, a clearer blue image can be displayed.

In one embodiment of the present invention, one pixel 300 includes a red subpixel 301, a cyan subpixel 302, a green subpixel 303, a red violet subpixel 304, a blue subpixel 305, The cyan sub-pixel 302, the red violet sub-pixel 304, and the yellow sub-pixel 306 are not limited to the blue sub-pixel 302 and the yellow sub-pixel 306 according to the color layer formed in the screen protector Any one can be formed.

For example, when the color layer of the screen protector reflects green light, a red purple sub pixel 304 capable of canceling green light, a blue sub pixel 301 for displaying an image, a green sub pixel 303 ) And the blue sub-pixel 305 may be composed of one pixel.

Although a large liquid crystal display device of 20 inches or more has been described above as an example, the present invention is not limited to this, and can be applied to a small liquid crystal display device such as a cellular phone.

As described above, according to the present invention, even when a color layer 201 for reflecting light of a specific wavelength band is formed on the top or bottom of the screen protector 200 or on the surface of the liquid crystal display panel and driving of the liquid crystal display device is stopped By displaying the color using external light, it is advantageous in appearance design compared with the conventional liquid crystal display device.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1 is a view showing a general liquid crystal display device.

2 is an exploded perspective view showing the liquid crystal display module.

3 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.

4 is a cross-sectional view of the liquid crystal display device taken along the line I-I 'of FIG.

5 is a plan view showing a part of the color filter substrate of the present invention.

Claims (8)

A liquid crystal display panel; A backlight unit disposed below the liquid crystal display panel; A screen protector disposed on the liquid crystal display panel to protect the liquid crystal display panel from the outside; A color layer disposed on the liquid crystal display panel and having a width larger than a width of the color filter substrate of the liquid crystal display panel and reflecting light of a specific wavelength band; And Wherein the color filter substrate of the liquid crystal display panel includes red, green and blue color filters for displaying a color at the time of displaying an image on each pixel, and an offset color filter for canceling light reflected by the color layer Wherein the color of the backlight unit except for black is displayed by the color layer using external light when the driving of the backlight unit is off. The method according to claim 1, Wherein the color layer is disposed on an upper surface or a lower surface of the screen protector. The method according to claim 1, And the color layer is disposed on an upper surface of the liquid crystal display panel. delete The method according to claim 1, Wherein the offset color filter is at least one of a cyan, a red violet, and a yellow color filter. The method according to claim 1, Wherein the canceling color filter comprises cyan, red, violet and yellow color filters. The method according to claim 6, Wherein the red color filter, the cyan color filter, the green color filter, the red violet color filter, the blue color filter, and the yellow color filter are sequentially arranged in one direction. The method according to claim 6, Wherein the cyan color filter is formed by sequentially overlapping a green color filter and a blue color filter, Wherein the red violet color filter is formed by sequentially overlapping a blue color filter and a red color filter, Wherein the yellow color filter is formed by sequentially overlapping a red color filter and a green color filter.

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